/Engine/Source/Runtime/Engine/Public/InGamePerformanceTracker.h
static class [IConsoleVariable](API\Runtime\Core\HAL\IConsoleVariable) * HistorySize = IConsoleManager::Get().RegisterConsoleVariable(TEXT("InGamePerformanceTracking.HistorySize"), 30, TEXT("How many frames in game performance tracking should store in it's history."), ECVF_Default);